4.1.1 magnetic materials

• magnetic attraction - south to north
• like poles repel

  opposite poles attract
• magnetic materials can be attracted by a magnet but cannot be repelled by a magnet
• only two magnets can repel each other
• non-magnetic materials will never be attracted to magnets
• permanent magnets are always magnetic, even when they are not near other magnets.

  • they produce their own magnetic field
• induced magnetism - magnetic materials that become magnetic when in the presence of a magnetic field.

  • when moved away from permanent magnet, they will stop being magnetic
• • The permanent magnet induces (creates) temporary poles in the magnetic material and these align so that the magnetic material is attracted to the permanent magnet.
  • If the north pole of the magnet is next to the magnetic material, then a south pole will be induced in the part of the material closest to the magnet.